ero electronic LHI R, Дополнение

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6 GB GB GB GB GB
B) LOGIC INPUT (For models with Serial B) LOGIC INPUT (For models with Serial B) LOGIC INPUT (For models with Serial B) LOGIC INPUT (For models with Serial B) LOGIC INPUT (For models with Serial
Interface only) Interface only) Interface only) Interface only) Interface only)
This input is used for remote alarm reset when
the manual reset of the alarm is selected.
Safety note:
- Do not run logic input wiring with AC power
cables.
- Use an external dry contact capable of
switching 0.5 mA, 5 Vdc.
- The instrument needs 100 ms to recognize a
contact status variation.
- The logic inputs are NOT NOT NOT NOT NOT isolated by the
measuring input.
Fig. 9- LOGIC INPUT WIRING
Logic input
LINEAR INPUT LINEAR INPUT LINEAR INPUT LINEAR INPUT LINEAR INPUT
Fig. 8 mA, mV AND V INPUTS WIRING
NOTE NOTE NOTE NOTE NOTE:
1) Do not run input wires together with power
cables.
2) Pay attention to the line resistance; a high line
resistance may cause measurement errors.
3) When shielded cable is used, it should be
grounded at one side only to avoid ground loop
currents.
4) The input impedance is equal to:
< 5
Ω
for 20 mA dc input
> 1 M Ω for 60 mV dc input
> 400 k
Ω
for 5 Vdc and 10 Vdc input
Shield
_
+
mA,
mV
or
V
14
+
_
G
mA
mV
or
V
15
14
15
12
13
lhlr-1-a0.pmd 05/06/2006, 9.20 6